C
C
Receive Text up to a Matching Sequence
See more Socket/SSL/TLS Examples
Demonstrates Socket.ReceiveUntilMatch, which receives bytes until an exact byte sequence is found. The match string is encoded using StringCharset and compared byte-for-byte.
Background. The comparison is case-sensitive with no Unicode normalization. This is useful for reading a message that ends with an application-defined marker delimiting the end of a response.
Chilkat C Downloads
#include <C_CkSocket.h>
void ChilkatSample(void)
{
BOOL success;
HCkSocket socket;
BOOL bTls;
int maxWaitMs;
const char *command;
const char *response;
success = FALSE;
socket = CkSocket_Create();
// Connect to the server using TLS. The 3rd argument enables the TLS handshake after the TCP
// connection succeeds; the 4th is the maximum time to wait, in milliseconds.
bTls = TRUE;
maxWaitMs = 5000;
success = CkSocket_Connect(socket,"example.com",5000,bTls,maxWaitMs);
if (success == FALSE) {
printf("%s\n",CkSocket_lastErrorText(socket));
CkSocket_Dispose(socket);
return;
}
// StringCharset controls the character encoding used when sending and receiving text.
CkSocket_putStringCharset(socket,"utf-8");
// Send a request using a simple application-defined text protocol in which each message ends with a
// CRLF.
command = "STATUS\r\n";
success = CkSocket_SendString(socket,command);
if (success == FALSE) {
printf("%s\n",CkSocket_lastErrorText(socket));
CkSocket_Dispose(socket);
return;
}
// Receive bytes until an exact byte sequence is found. The match string is encoded using
// StringCharset and compared byte-for-byte. Here the server marks the end of its response with an
// application-defined marker.
response = CkSocket_receiveUntilMatch(socket,"<EOM>");
if (CkSocket_getLastMethodSuccess(socket) == FALSE) {
printf("%s\n",CkSocket_lastErrorText(socket));
CkSocket_Dispose(socket);
return;
}
printf("%s\n",response);
CkSocket_Dispose(socket);
}